Search Results - "Crowter, K."
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The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background
Published in The Astrophysical journal (20-05-2018)“…We search for an isotropic stochastic gravitational-wave background (GWB) in the newly released 11 year data set from the North American Nanohertz Observatory…”
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The International Pulsar Timing Array: Second Data Release
Published in Monthly notices of the Royal Astronomical Society (01-12-2019)“…In this paper, we describe the International Pulsar Timing Array second data release, which includes recent pulsar timing data obtained by three regional…”
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THE NANOGRAV NINE-YEAR DATA SET: LIMITS ON THE ISOTROPIC STOCHASTIC GRAVITATIONAL WAVE BACKGROUND
Published in The Astrophysical journal (10-04-2016)“…ABSTRACT We compute upper limits on the nanohertz-frequency isotropic stochastic gravitational wave background (GWB) using the 9 year data set from the North…”
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The International Pulsar Timing Array second data release: Search for an isotropic gravitational wave background
Published in Monthly notices of the Royal Astronomical Society (19-01-2022)“…ABSTRACT We searched for an isotropic stochastic gravitational wave background in the second data release of the International Pulsar Timing Array, a global…”
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The NANOGrav 11 yr Data Set: Limits on Gravitational Wave Memory
Published in The Astrophysical journal (20-01-2020)“…The mergers of supermassive black hole binaries (SMBHBs) promise to be incredible sources of gravitational waves (GWs). While the oscillatory part of the…”
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The NANOGrav 11 yr Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries
Published in The Astrophysical journal (01-08-2019)“…Observations indicate that nearly all galaxies contain supermassive black holes at their centers. When galaxies merge, their component black holes form SMBH…”
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Searching for continuous Gravitational Waves in the second data release of the International Pulsar Timing Array
Published in Monthly notices of the Royal Astronomical Society (31-03-2023)“…ABSTRACT The International Pulsar Timing Array 2nd data release is the combination of data sets from worldwide collaborations. In this study, we search for…”
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The NANOGrav 12.5 yr Data Set: Polarimetry and Faraday Rotation Measures from Observations of Millisecond Pulsars with the Green Bank Telescope
Published in The Astrophysical journal (01-02-2022)“…Abstract In this work, we present polarization profiles for 23 millisecond pulsars observed at 820 and 1500 MHz with the Green Bank Telescope as part of the…”
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The NANOGrav Nine-year Data Set: Measurement and Analysis of Variations in Dispersion Measures
Published in The Astrophysical journal (01-06-2017)“…We analyze dispersion measure (DM) variations of 37 millisecond pulsars in the nine-year North American Nanohertz Observatory for Gravitational Waves…”
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Tests of Gravitational Symmetries with Pulsar Binary J1713+0747
Published in Monthly notices of the Royal Astronomical Society (21-01-2019)“…Symmetries play a fundamental role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries…”
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Modeling the Uncertainties of Solar System Ephemerides for Robust Gravitational-wave Searches with Pulsar-timing Arrays
Published in The Astrophysical journal (01-04-2020)“…The regularity of pulsar emissions becomes apparent once we reference the pulses' times of arrivals to the inertial rest frame of the solar system. It follows…”
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Comparing Recent Pulsar Timing Array Results on the Nanohertz Stochastic Gravitational-wave Background
Published in The Astrophysical journal (01-05-2024)“…Abstract The Australian, Chinese, European, Indian, and North American pulsar timing array (PTA) collaborations recently reported, at varying levels, evidence…”
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The Green Bank North Celestial Cap Survey. IX. Timing Follow-up for 128 Pulsars
Published in The Astrophysical journal (01-02-2024)“…Abstract The Green Bank North Celestial Cap survey is one of the largest and most sensitive searches for pulsars and transient radio objects. Observations for…”
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THE NANOGRAV NINE-YEAR DATA SET: EXCESS NOISE IN MILLISECOND PULSAR ARRIVAL TIMES
Published in The Astrophysical journal (01-01-2017)“…ABSTRACT Gravitational wave (GW) astronomy using a pulsar timing array requires high-quality millisecond pulsars (MSPs), correctable interstellar propagation…”
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First Discovery of New Pulsars and RRATs with CHIME/FRB
Published in The Astrophysical journal (01-11-2021)“…Abstract We report the discovery of seven new Galactic pulsars with the Canadian Hydrogen Intensity Mapping Experiment’s Fast Radio Burst (CHIME/FRB) backend…”
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THE NANOGRAV NINE-YEAR DATA SET: NOISE BUDGET FOR PULSAR ARRIVAL TIMES ON INTRADAY TIMESCALES
Published in The Astrophysical journal (10-03-2016)“…ABSTRACT The use of pulsars as astrophysical clocks for gravitational wave (GW) experiments demands the highest possible timing precision. Pulse times of…”
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The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics
Published in The Astrophysical journal (20-02-2020)“…An ensemble of inspiraling supermassive black hole binaries should produce a stochastic background of very low frequency gravitational waves. This stochastic…”
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The NANOGrav 11 yr Data Set: Solar Wind Sounding through Pulsar Timing
Published in The Astrophysical journal (20-02-2019)“…The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has observed dozens of millisecond pulsars for over a decade. We have accrued a…”
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The NANOGrav 11-year Data Set: Pulse Profile Variability
Published in The Astrophysical journal (01-12-2018)“…Access to 50 years of data has led to the discovery of pulsar emission and rotation variability on timescales of months and years. Most of this long-term…”
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